Wasibingto-n beck



(No Model.)

A W. BECK.

GLASS MOLD.

No 301,427. Patented- July 1, 1884.

' ui-zforne y.

N. PUERS. Pholwlithagnpher. wmm un. o. a

- I UNITED STATES:

PATENT Utmost WASHINGTON BECK, OF PITTSBURG, PENNSYLVANIA.

GLASS-MOLD.

SPECIFICATION forming part of Letters Patent No. 301,427, dated July 1,1884.

Application filed May 10,18B4. (No model.)

5. Pennsylvania, have invented certain new and useful Improvements inGlass-Molds, of which the following is a specification, reference be-.ing had therein to the accompanying drawings,

My invention relates to improvements in molds for pressingglassware witha hole therethrough, and belongs to that class of devices in which themain compression-plunger in its descent into the mold to give shape tothe 15 glass comes in contact with. the top of a movable plug located inthe bottom of the mold, and forces the said plug down with it, thusleaving the article with an aperture or apertures through it. 1

My invention consists in providing the plug or plunger in the bottom ofthe mold with a spear-headed projection,which, when the plug isdepressed, engages with catches which hold the plug in a depressedposition until the article is removed from the mold, when the catchesare separated, and the plug released;

and forced upward by the action of a spring. My invention consists,further, in providing the upper or main compression-plunger with 0 arecess or cavity, so that the edges will impinge on the edges of theupper end of the plug,and thus prevent any dirt or fragments of glassfrom keeping the plunger from coming in immediate contact with the plug,as

will more fully appear.

Figure 1 is a vertical sectional view. Fig. 2 is a top or plan view ofthe base, taken on the line a: a; of Fig. 1.

In the drawings I have shown a mold and plunger adapted to form a glassrim or ring for pulley-wheels, and in my description will confine myselfto the devices shown; but it is obvious that the molds can be changed toform other articles in which an aperture or aper- 5 tures are desired,and my improvements used thereon without departing from the spirit of myinvention.

A is the base or bottom of the mold, mounted on a bed-plate, B, andsecured thereto by the posts or standards 0.

D is the mold proper, divided into twp or more sections hinged togetherin the usual manner and adapted to be held onto the base or bottom A ofthe mold by means of dovetailed projections and recesses, as is thecommon practice with this class of molds.

E is the usual mold-ring, which arrests the upward flow of the glass andgives form to a portion of the article.

F is a metal plug, which fits snugly within and through a perforation inthe base A. The plug'F is made hollow on its lower side in order toreceive and retain the upper end of a spiral spring, G, the lower end ofsaid spiral spring being held in position by a projecting rim or flange,H, secured to the base-plate B. The lower end of the plug is providedwith a flange, I, which limits the upward travel of the plug by comingin contact with the under side of the mold-bottom A.

K is a spear-headed .pin or bar secured to the interior of the plug F,which, when the plug is forced down by the plunger, engages withspring-catches L L, and holds the plug in the lowered or depressedposition until the spring-catches are forced apart by the wedgeshapedblock M and lever N, when the plug will be released and forced upwardinto the mold-cavity by means of the spring G.

O is the plunger, which is secured to the piston or cross-head of thepress in the usual manner. The lower face of the plunger is providedwith arecess or cavity, P, so that theupper edge of the plug F will comein contact with the plunger around the edges of this cavity P, by whichconstruction the plunger and plug are less liable to be kept separate bydirt or fragments of glass during the pressing operation.

From the foregoing description the operation of my device will beapparent to those skilled in the art. Suffice it to say, however, thatthe molten glass is placed in the mold around the plug F when said plugis in an elevated position. The mold is then pushed under the plunger,and the plunger depressed, which, coming in contact with the plug F,forces it down, and gives shape to the article. The plug is held in thisdepressed position by the devices already described until the plungerhas been withdrawn and the article removed from the mold, when the plugis released and rises to its upward position again.

It is the ring or rim of a pulley-wheel adapted to be used oncable-railways, and is provided with a groove, a, in which the rope orcable travels.

Instead of the spear-headed projection and catches to hold the plug in adepressed position, I may form cavities in the sides of the plug, inwhich pins or bolts located in or on the base or bottom of the mold,operated either by hand or by springs, will be thrust, to hold the samein a depressed position until the article has been removed from themold.

I have also described the mold as a sectional one; but I do not wish tolimit myself to this construction, as it is obvious that in formingtapering articlesas lampshades, shade-holders, &c.they can be formed ina solid mold that is, a mold in one piece-or, in making certain otherarticles, a portion of the mold can be made solid or in one piece andthe other portion hinged in sections.

It will also be apparent that by the use of my devices, as abovedescribed, picture-frames, lamp-shades, lamp-globes, illuminators,clockframes, and an endless number of articles of this class can be madeby the devices described.

7 It is also an important feature of my invention that the spear-headedprojection should be centrally located-that is, on a direct line withthe axis of the plunger; or, if the spring bolts or pins are usedinstead of the spearheaded projection, that they should operateperfectly, so that the plug will be caught and held accurately and in aperpendicular line, in order that the article will not be broken'by thetwisting or deviating of the plug from a perpendicular line.

In pressing small articles a solid plug may be used; but for largearticles of the class shown a hollow plug is desirable, for the reasonthat it can be more readily kept at a proper degree of heat for pressingthe article without crizzeling or cracking the same.

Having thus described my invention, what i I claim is-- 5 1. In moldsfor pressing open glassware, a

plug movable through the bottom of said mold,

operated by a spring to hold said plug 'in an elevated position, andprovided with a spearheaded pin for engaging with catches secured on thebase-plate of the mold, whereby when the plug is depressed it will beheld in such depressed position until the article has been removed fromthe mold.

3. In a glass-mold, the plug F, provided with the flange I andspear-headed pin K, in combination with the spring G and catches L L, asand for the purpose set forth.

4. In a glass mold of the character described, the spring-actuated plugF, provided with the spear-headed pin K, in combination with the catchesL, wedge-shaped block or bar M, and lever N, as and for the purpose setI forth.

5. The plunger 0, provided with the cavity P, in combination with theyielding plug F, as and for the purpose set forth.

In testimony whereof I'affix my signature in presence of two witnesses.

WASHINGTON BECK.

Witnesses:

' J. M. YZNAGA,

GUY L. DnMorrn.

